fix syntax error

app.py

@@ -17,7 +17,7 @@ def texttoaudio(prompt, neg_prompt, seed, inf_steps, guidance_scale):
                  prompt, 
                  neg_prompt=neg_prompt,
                  num_inference_steps=inf_steps,
-                 guidance_scale=guidance_scale
+                 guidance_scale=guidance_scale,
                  audio_length_in_s=5.0,
                  generator=generator.manual_seed(int(seed)),
                 ).audios[0]